This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The show() method of the HTMLDialogElement interface displays the dialog modelessly, i.e. still allowing interaction with content outside of the dialog.




Return value



The following example shows a simple button that, when clicked, opens a <dialog> containing a form via the show() method. From there you can click the Cancel button to close the dialog (via the HTMLDialogElement.close() method), or submit the form via the submit button.

  <!-- Simple pop-up dialog box, containing a form -->
  <dialog id="favDialog">
    <form method="dialog">
        <p><label for="favAnimal">Favorite animal:</label>
        <select id="favAnimal" name="favAnimal">
          <option>Brine shrimp</option>
          <option>Red panda</option>
          <option>Spider monkey</option>
        <button id="cancel" type="reset">Cancel</button>
        <button type="submit">Confirm</button>

    <button id="updateDetails">Update details</button>

    (function() {
      var updateButton = document.getElementById('updateDetails');
      var cancelButton = document.getElementById('cancel');
      var dialog = document.getElementById('favDialog');
      dialog.returnValue = 'favAnimal';

      function openCheck(dialog) {
        if( {
          console.log('Dialog open');
        } else {
          console.log('Dialog closed');

      // Update button opens a modal dialog
      updateButton.addEventListener('click', function() {

      // Form cancel button closes the dialog box
      cancelButton.addEventListener('click', function() {



Specification Status Comment
HTML Living Standard
The definition of 'show()' in that specification.
Living Standard  
HTML 5.1
The definition of 'show()' in that specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support37 Yes531 2 No Yes No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No ?531 2 No No ?

1. See bug 840640.

2. From version 53: this feature is behind the dom.dialog_element.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

  • The HTML element implementing this interface: <dialog>.

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills
 Last updated by: fscholz,